package cn.hdu.liang.reusing;

class Engine {
    public void start() {

    }

    public void rev() {

    }

    public void stop() {

    }

    @Deprecated
    public void service() {
        System.out.println("Engine.service");
    }
}

class Wheel {
    public void inflate(int psi) {

    }
}

class Window {
    public void rollup() {

    }

    public void rolldown() {

    }
}

class Door {
    public Window window = new Window();

    public void open() {

    }


    public void close() {

    }
}

public class Car {
    public Engine engine = new Engine();
    public Wheel[] wheels = new Wheel[4];
    public Door left = new Door();
    public Door right = new Door();

    public Car() {
        for(int i = 0; i < 4; i++) {
            wheels[i] = new Wheel();
        }
    }

    public static void main(String[] args) {
        Car car = new Car();
        car.left.window.rollup();
        car.wheels[0].inflate(72);
        car.engine.service();
    }
}
